Mana issues as resto pvp

Anyone else having mana issues in pvp? Just seems like I am struggling with mana while other healers can barely go oom. Am I doing something wrong? I can usually never even keep water shield on me for the regen cus I always need earth shield on. Healing wave does nothing so I am forced to use my expensive heals and go oom.

You can oom fast with healing surge. And if you are forced to put on Earth Shield it means someone is attacking you. That shouldn't be the case for too long - if it is your team mates don't take advantage of being left alone.